Pipe



L. STI-:RN

PIEE

Filed July l, 1932 MALLrrToRM-:Y

May 9, 1933.

Patented May 9, 1933 l UNITED STATES PATENT OFFICE LUDWIG STERN, F NEW YORK, N. Y., ASSIGNOR T0 L. & II. STERN, INC., OF BROOKLYN, NEW YORK PIPE Application filed July 1, 1932. Serial No. 620,556.

The object of my invention is to provide a pipe which will be durable, self-cleaning, simple in construction, and not liable to get out of order. These and other objects are accomplished by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more particular description of my invention, reference is to be had to the aocompanying drawing, forming a part hereof, in which Figure 1 is a side elevation, partially in section, of my improved pipe;

Figure 2 shows elements of the same; and

Figure 3 is an enlarged longitudinal section of the centre portion of the pipe.

Thoughout the various views of the drawing, similar reference characters designate similar parts.

My improved pipe 1 has a bowl 2 with an integral stem 3 to which is connected a mouthpiece 4 by means which will be described below. 'Ihe bowl and stem may be of any conventional design or kind. In the stem is fixed a boss 5 which is composed of a cylindrical piece of metal, preferably aluminum, with a flange abutting against the end of the stem. This boss may be secured in any suitable way as by screw threads 6. It also has enlarged interior threads 7 which engage corresponding threads 8 on a cleaner 9, which has a flange 10 and a roughened cylindrical edge 11 which is forced into a corresponding opening 12 in the mouthpiece 4, and thereafter while the mouthpiece is hot, the walls of the opening 12 are forced against the part 11 until the cleaner 9 is fixed firmly to the mouthpiece 4 with the flange 10 abutting against an end of this mouthpiece.

In the preferred embodiment of my invention, the cleaner 9 has a pin head 13 at its inner end slotted at 14 to permit a draft through the pipe, and there is another slot 15 which runs to a bore 16 within the screw threads 8, the collar 10, and the roughened end 11.

It is apparent from the foregoing, that when' the parts of the pipe are assembled, as shown in Figures 1 and 3, the boss 5 and collar 10 are in intimate contact, and the former is fixed to the stem 3 and the latter to the mouthpiece 4. When the mouthpiece is unscrewed and withdrawn, the head 13 acts as a cleaner to clean the interior of the bore of the boss.

The pipe is used in the conventional manner.

While I have shown and described one embodiment of my invention, it is obvious that it is not restricted thereto, but that it is broad enough to cover all structures that comev within the scope of the annexed claims.

Having thus described my invention, what I claim is:

l. A pipe having a bowl, a stem connected thereto, a tubular boss open at both of its ends fitted within the stem, said boss being internally threaded and provided with a flange abutting against the end of the stem, a mouthpiece, a cleaner fitted in the mouth' piece and provided with a flange abutting against the end of the mouthpiece and also abutting against the flange on the boss when the stem and mouthpiece are placed together, said cleaner being received within the boss and having an enlarged head projecting beyond the inner end of the boss within the stem.

2. A, pipe having a bowl and connected stem, a tubular open-ended boss threaded into the stem, avcoarse internal thread on the boss, a flange on the bossin abutment with the end of the stem, a mouthpiece, a threaded cleaner received in the internal thread in the boss, a flange on the cleaner in abut ment with the end of the mouthpiece and in abutment with the flange on the boss, a roughened part on the cleaner frictionally held in the mouthpiece and a head on the cleaner projecting beyond the inner end of the boss and into the stem. i

In testimony whereof, I have hereunto set my hand this th day of June 1932.

LUDWIG STERN. 

